Dantherm CDF 35 Service Manual page 16

Product- and functional description,
Built in hygrostat,
continued
Connection of
external hygrostat
Fan control
Compressor
control
Display indications A display on the side of the unit clearly indicates the working modes.
16
If you want to set the hygrostat lower than 60 %RH, turn the adjusting screw clockwise.
We recommend installing an external hygrostat if you want to change/adjust the setting
of relative humidity very often.
Connect an external hygrostat by uncoupling the built-in hygrostat from the terminals
21/22 and then connecting the external hygrostat to these terminals. The hygrostat
cable is led out through the base of the unit and the hygrostat is fixed to a wall in an
appropriate place. The outlet for the external hygrostat is 12 V.
When the dehumidifier is started by the hygrostat, the fan is activated at the same time
as the compressor.
If continuous ventilation is required – i.e. independent of the dehumidification demand –
a bridge must be made between the terminals 25 and 26.
The number of compressor startings is limited by a 6 minutes timer, which starts when
the compressor is switched on. The timer must have come to an end before the
compressor can be switched on again.
Each time the unit has been switched off on the main switch, by the built-in hygrostat,
or by an external hygrostat, it will take 30 seconds before the unit can be switched on
again. This is a safety function protecting the compressor against overloading caused
by too high pressure in the cooling circuit at start up.
Part
Power is on
Cooling
circuit failure
– the
dehumidifier
is switched
off
Ambient
temperature
below 3 °C –
the
dehumidifier
is switched
off
continued
Function
The LED lights up in green when power is connected to
the unit.
During continuous ventilation there are no display
indications. In this operation mode the flash will light up
constantly in green to show that power is on
Pressure or temperature on the HP side of the cooling
circuit is too high and therefore the unit was switched
off automatically in order to protect the compressor.
After 45 minutes the unit restarts automatically.
After restart the triangle LED will flash on and off in red
to indicate that the unit is working and that the
condenser sensor has registered a failure on the unit.
To turn off the triangle LED, disconnect and connect
the power supply to the unit
The dehumidifier starts again automatically when the
ambient temperature increases to more than 3 °C.
Continued overleaf